Re: Language extension histories

That's not all that helpful, because both extensions evolved quite a bit since their initial introduction. On Sat, Oct 31, 2020, 9:35 PM Takenobu Tani wrote:

Hi,

Maybe the next page is what you want? : https://gitlab.haskell.org/ghc/ghc/-/wikis/language-pragma-history

PatternSynonyms was implemented in GHC 7.8, and TypeFamilyDependencies was implemented in GHC 8.0.

Regards, Takenobu

On Sun, Nov 1, 2020 at 2:08 AM David Feuer wrote:

...

I'm working on some code I want to be compatible with multiple GHC

versions and I'm trying to figure out which language extensions I can reasonably use. I definitely need usable fancy pattern synonyms (not the bare-bones ones in 7.8). So that should set a lower bound, but I don't remember where. 7.10? 8.0? I'd also *like* to use an injective type family, but I can work around that pretty easily with a data family if necessary. When did PatternSynonyms and TypeFamilyDependencies each become reasonably usable?

...

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